直流发电机的主磁极气隙偏大时，电机空载电压偏高。
参考答案：错
________, what he has said _______ to be _______ as we haven’t investigated the site yet.
A．Obviously; remains; proved `
B．Fundamentally; is remained; balanced
C．Traditionally; remaining; checked
D．Unbelievably; remains; settled
以下出口单价只有( )是正确的。
A．250美元／桶
B．250美元／通ElF纽约
C．250美元／桶CIF广州
D．250美元／桶CFR德国
